Finn family Moomintroll... I loved that book as a kid! 
My first encounter was Comet in Moominland back in the 1970s. It's nice to see that the Moomins are still popular, they are such gentle characters - created in 1945 as an antidote to the horrors of the war, apparently.
Incidentally, I reckon that this:

is the Snork Maiden, Moomintroll's girlfriend. She is a Snork rather than a Moomin, so maybe not a troll at all?
Clearly getting a definitive answer to this question should be the real object of a troll poll.